【题目】The government must be very ________ about setting policies and make no decision until they are quite sure it is the right one.
A. serious B. concerned C. cautious D. nervous
在线课程【答案】C
【解析】
试题分析：考查形容词辨析。句意：政府必须谨慎制定政策，直到十分确定这是对的，才能作出决定。be cautious about 对 ...谨慎。serious严肃的；concerned .对……关心；nervous紧张的。故选C。